EN 60974-4:2007

SLOVENSKI STANDARD
01-oktober-2007
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Arc welding equipment -- Part 4: In-service inspection and testing
Lichtbogenschweißeinrichtungen - Teil 4: Besichtigung und Prüfung während des
Betriebes
Matériel de soudage a l'arc -- Partie 4: Inspection et essai en service
Ta slovenski standard je istoveten z: EN 60974-4:2007
ICS:
25.160.30 Varilna oprema Welding equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60974-4
NORME EUROPÉENNE
February 2007
EUROPÄISCHE NORM
ICS 25.160
English version
Arc welding equipment -
Part 4: In-service inspection and testing
(IEC 60974-4:2006)
Matériel de soudage à l'arc -  Lichtbogenschweißeinrichtungen -
Partie 4: Inspection et essai en service Teil 4: Instandhaltung und Prüfung
(CEI 60974-4:2006) (IEC 60974-4:2006)

This European Standard was approved by CENELEC on 2006-12-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60974-4:2007 E
Foreword
The text of document 26/340/FDIS, future edition 1 of IEC 60974-4, prepared by IEC TC 26, Electric
welding, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 60974-4 on 2006-12-01.
This standard is to be used in conjunction with EN 60974-1.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2007-09-01
– latest date by which the national standards conflicting
(dow) 2009-12-01
with the EN have to be withdrawn
This European Standard covers the essential requirements given in Article 4 of Council Directive
89/655/EEC concerning the minimum safety and health requirements for the use of work equipment by
workers at work, as amended by Directive 95/63/EC.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60974-4:2006 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60974-4:2007
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

1)
IEC 60050-151 - International Electrotechnical Vocabulary - -
(IEV) -
Part 151: Electrical and magnetic devices

1)
IEC 60050-195 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 195: Earthing and protection against
electric shock
1)
IEC 60050-851 - International electrotechnical vocabulary - -
(IEV) -
Chapter 851: Electric welding
1) 2)
IEC 60974-1 - Arc welding equipment - EN 60974-1 2005
Part 1: Welding power sources
1)
IEC 61557-4 - Electrical safety in low voltage distribution - -
systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or
monitoring of protective measures -
Part 4: Resistance of earth connection and
equipotential bonding
1)
Undated reference.
2)
Valid edition at date of issue.

NORME CEI
INTERNATIONALE
IEC
60974-4
INTERNATIONAL
Première édition
STANDARD
First edition
2006-10
Matériel de soudage à l’arc –
Partie 4:
Inspection et essai en service

Arc welding equipment –
Part 4:
In-service inspection and testing
© IEC 2006 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
N
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

60974-4 © IEC:2006 – 3 –
CONTENTS
FOREWORD.5

1 Scope.9
2 Normative references .9
3 Terms and definitions .9
4 General requirements .11
4.1 Qualification of test personnel .11
4.2 Test conditions.11
4.3 Measuring instruments .11
4.4 Periodic inspection and test.11
4.5 Maintenance.11
4.6 Repair .11
4.7 Test sequence.11
5 Protection against electrical shock.13
5.1 Visual inspection .13
5.2 Continuity of the protective circuit.13
5.3 Insulation resistance .15
5.4 Welding circuit leakage current.15
5.5 Primary leakage current .17
5.6 No-load voltage (U ).19
6 Functional test.21
6.1 Function .21
6.2 Supply-circuit on/off switching device .21
6.3 Voltage-reducing device .21
6.4 Magnetic gas valve.23
6.5 Signal and control lamps .23
7 Documentation .23
7.1 Test report .23
7.2 Labelling .23

Annex A (informative) Check-list for the visual inspection .25
Annex B (informative) Example of a test report after repair .27
Annex C (informative) Equipment not built in accordance with IEC 60974-1.29

Figure 1 – Measurement of leakage current of welding circuit .15
Figure 2 – Measuring network for primary leakage current .17
Figure 3 – Principles of primary leakage current measurement for single phase equipment .19
Figure 4 – Measurement of peak values.21

Table 1 – Test sequence on used arc welding equipment .13
Table 2 – Insulation resistance .15

60974-4 © IEC:2006 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ARC WELDING EQUIPMENT –
Part 4: In-service inspection and testing

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60974-4 has been prepared by IEC technical committee 26:
Electric welding.
The text of this standard is based on the following documents:
FDIS Report on voting
26/340/FDIS 26/343/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The list of all the parts of the IEC 60974 series, under the general title Arc welding equipment,
can be found on the IEC website.

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